I'm working on this block right now using Jodi Barrows Square in A Square Ruler...although its really easy to figure out without it. These are just two of the fancy ways to do it. =)
http://squarequilting.com/
there is also a In the Hoop Machine embroidery design that is really really cool.
http://www.kennykreations.com/produc...-in-a-square4/